Method of repairing scored cylinders



Z. J. EURY.

METHOD OF REPAIRING SCORED CYLINDERS. APPLICATION FILED MAY 1. 1919.RENEWED JUNE 6, I921.

.1 84,456. E Patented July 12, 1921.

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R R w 2 R w R v 0 a v R J R R R I I R R r UNITED STATES PATENT OFFICE.

METHOD OF REPAIRING SCOBED CYLINDERS.

Application filed May 1, 1919, Serial No. 294,126. Renewed June 6, 1921.

To all whom it may concern:

Be it known that I ZEBULON J. EURY,a citizen of the United states ofAmerica, residing at Forth W'orth, in the county of Tar-rant and Stateof Texas, have invented certain new and useful Improvements in Methodsof Repairing Scored Cylinders, of which the following is aspecification.

My inventionrelates' to improvements in repairing scored cylinders andparticularly for repairing scored cylinders of internal combustionengines; and the object is to provide a simple and highly eflicientmethod of repairing scored cylinders and which will make the cylindersas smooth and hard as they were originally before being scored, and tofill the scores with a composition of metal which will be as firm as theoriginal metal of the cylinder. Other objects and advantages will befully explained in the following description and the invention will bemore particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of theapplication.

Figure 1 is a broken section of a cylinder, showing several repairs ofscores. Fig. 2 is a cross section of the repaired score at a.

Fig. 3 is a cross section of the repaired score at b. Fig. 4 is across-section of the repaired score at 0.

Similar characters of reference are used to indicate the same partsthroughout the several views.

In repairing the scores, the score is made deeper and the edges areundercut, or cut so that the metal added will be dove-tailed into thesurface of the cylinder as shown at a, Figs. 1 and 2. The added metalmay be melted and forced into the score by an acetylene torch. An alloyof zinc, tin, and silver may be used as hereinafter specified, and whenprepared, this alloy is forced into the scored portion until the metalis firmly pressed into score until the metal fills all the undercutedges. The surface of the metal is then ground smooth to conform to thecontour of the interior surface of the cylinder. This alloy has a highmelting point and when carefully placed and anchored in the score in themanner described, the interior surface of the cylinder is as smooth asthe cylinder originally appeared before being scored.-

Sp'ecification of Letters Patent.

Patented July12, 1921.

Serial No. 475,558.

Another method of anchoring the repair alloy in the cylinder is to drillout the score deeper and undercut the edges, as shown at 6, Figs. 1 and3. Small holes are then made through the undercut edges so that when thealloy is forced into the score, the alloy Wlll pro ect through theopenings in the overhanging edges, as illustrated in Fig. 3. After thealloy is forced into the drilled out score and through the openings toform the pro ectiOns g, the alloy is ground smooth to conform to theinterior surface of the cylinder. In this manner the alloy is firmly an-'chored to the interior of the cylinder.

Another method of anchoring the repair alloy to the cylinder is to drillout the score as shown at 0 in Figs. 1 and 4. After the score is drilledout, small cavities h are made in the bottom of the score, as shown at hin the score (1. The alloy is then forced into the score and into thecavities it. The alloy is then ground smooth as before. When sorepaired, the alloy is firmly anchored in the score and cannot beremoved by any ordinary service. Different alloys may be used, such ascopper, tin, and silver combined.

The composition may consist of block tin containing 2% of silver and 1%of nickel, or the same composition with T}-% of zinc added, or of silversolder and 1 to 2% of nickel, or tin and silver solder with 3% to 8%nickel added.

Variations in the method described may be made without departing from myinvention.

What I claim, is,-

1. The method herein described which consists in drilling scores incylinders and forming undercut edges with perforations therein, formingand forcing an alloy of high melting point into and filling the scoresand interlocking the alloy in said perforations, and then polishing thealloy and making the same conform to the interior surface of thecylinder.

2. The method herein described which consists in drilling scores incylinders with undercut edges and forming cavities in the scores,forming and forcing an alloy of high melting point by blow torch intothe scores and into the cavities therein for anchoring the alloy in thecavities in the scores, and then polishing the alloy to make the sameconform to the interior surface of the cylinder;

3. The method herein described for rewhile in lastic condition. and thenpolishpairing scored cylinders of internal combusing the a loy to makethe Same conform to tionengines which consists in drilhng the theinterior surface of the cylinder. scores to form openings with undercutedges In testimon .whereof, I set my hand this 5 and forming cavitiestherein, forming and 28th day of pril, 1919.

forcing an alloy of zinc, tin, and silver by ZEBULON J. EURY.

blow torch into the scores and the cavities

